Income Tax Expense (Tables)

3 Months Ended

Mar. 31, 2014

Income Tax Expense [Abstract]

Income Tax Expense [Table Text Block]

	Quarter Ended
	March 31,
	2014			2013
Millions
Current Tax Expense (Benefit)
Federal (a)	—				$0.2
State (a)	—			—
Total Current Tax Expense (Benefit)	—			0.2
Deferred Tax Expense (Benefit)
Federal		$6.3			$5.8
State	2.7			1.7
Investment Tax Credit Amortization	(0.2		)	(0.2		)
Total Deferred Tax Expense	8.8			7.3
Total Income Tax Expense		$8.8			$7.5

(a) For the quarter ended March 31, 2014, the federal and state current tax expense of zero was due to the utilization of NOL carryforwards from prior periods. For the quarter ended March 31, 2013, the federal and state current tax expense of $0.2 million and zero, respectively, was due to federal and state NOLs which resulted from the bonus depreciation provision of the American Taxpayer Relief Act of 2012. The federal and state NOLs remaining after utilization in 2014 will be carried forward to offset future taxable income.